Eisenhuth



Patanted"'Feb. 28, I899.

J. W. EISENHUTH. EXPLOSIVE ENGINE FDR VEHICLES.

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No. 620,43l. Patented .Feb.' 28, I899.

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1N0. 620,43l. Patented 'Feb. 28, I899.

J. W. EISENHUTH. EXPLOSIVE ENGINE FOR VEHICLES.

(Application filed July 80, 1897.) (No Model.) 5 Sheets-Sheet 4.

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Patented Feb. 28, I899.

.1. w. EISEN-HUTH. EXPLOSIVE ENGINE run vsmcuzs.

(Applicatibn filed July 80, 189

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'(No Model.)

WITNESSES %5NVENTOH UNITED STATES PATENT OFFICE.

JOHN WASHINGTON EISENHUTH, OF NEW YORK, N. Y., ASSIGNOR TO ELLA V. EISENHUTH, OF SAME PLACE.

EXPLOSIV E-ENGINE FOR VEHICLES.

SPECIFICATION forming art of Letters Patent No. 620,431, dated February 28, 1899.

Application filed July 30, 1897. Serial No. 646,545. (No model.)

To all whom it may concern:

Be it known that I, JOHN WASHINGTON EISENI-IUTH, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Vehioles and Motors Therefor; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in motors, and has for its object the production of a motor which may be operated by gas or compressed air and one that is adapted to use either gas or air interchangeably.

It consists in certain novel constructions, combinations, and'arrangements of parts, as will be hereinafter more fully described and claimed.

In the drawings, Figure l is a vertical section through a portion of a vehicle, showing my improved motor, the cylinder and compressor being shown in side elevation. Fig. 2 represents a central horizontal section through the cylinder of the said motor. Fig. 3 is a vertical transverse section through my improved motor. Fig. 4 is a vertical transverse section through the cylinder and compressor of the motor, showing the position of the valves for operating the same. Fig. 5 represents a detail of the means for reversing the movement of the motor, Fig. 6 represents a detail View showing the electrodes for producing the sparks to ignite the explosive mixture forced into the cylinder of the motor. Fig. 7 represents a detail view'of a part of the same. Fig. 8 shows a side elevation of a vehicle with my improved motor located thereon, and Fig. 9 is a detail central vertical section of a mixer or carburetor employed in connection with my improved motor.

A in the drawings represents my improved motor, and B the frame of any suitable vehicle, upon which the same may be mounted.

My invention is applicable to all sorts of work where a gas or air engine may be employed, and is particularly adapted for use upon motor-vehicles of various kinds, such as motor cycles, carriages, and all sorts of like delivery-wagons.

The motor A may be mounted upon the frame of any suitable vehicle B and is preferably mounted within the said frame above the main shaft b thereof and is provided with a main cylinder 1. The cylinder 1 is preferably of' the oscillating type and is mounted in bearings 2, formed upon the upper ends of the arms 3 of the frame. The cylinder 1 is provided with a suitable piston 4, mounted upon a piston-rod 5, which extends through a suitable packing at one end of the cylinder. The outer end of the piston-rod 5 is secured to a crank pin or shaft 6, which connects with fly-wheels 7, suitably mounted in the frame. The fly-wheels 7 are secured upon the inner ends of the shafts 8, which have bearings in the upper end of the arms 9 of the frame. Roller-bearings, as 10, are preferably interposed between the piston-rod 5 and the crankpin 6. In order to lubricate the said bearing, the pin 6 is made hollow, as illustrated in Fig. 2 of the drawings, and rods 11 extend into the same from each end, being held in place by caps, as 12. Surrounding the rods 11 are springs 13, which are interposed between the caps 12' and the moving heads or Washers 14, which slide upon the rods 11. A lubricant of suitablecharacter, but preferably in the form of a grease or something of the same sort, is placed between the movable washers 14, and a constant pressure is exerted thereon by means of the springs 13, so that the lubricant is constantly forced into the bearings 10 through an opening 15 in the pin 6. The shafts 8, which carry the flywheels 7, are also made hollow and are provided with central rods, as 16, similar to rods 11, and the movable washers 17 also slide u pon the said rods 16, and coil-springs 18 force the said washers toward each other to force lubricant which may be placed between the same through apertures 19 into the bearings 20, formed upon the arms 9. It will be seen that by this improved construction the parts of the motor which are required to be in constant and rapid movement will be thoroughly and continually lubricated and in such a manner that they will only require occasional attention.

In order to provide for the oscillating movement of the cylinder 1, it is formed with bear- ICO ing-trunnions, as 21 22. These trunnions are formed upon the opposite sides of the cylinder 1 and are provided with roller-bearings, as 23, similar to those heretofore described. The cylinder thus mounted is free to oscillate in accordance with themovement of the piston-rod 5. A serious difficulty in the use of gas-engines of this character heretofore has been the great heat caused by the con tinual explosions of the gas in the cylinder.

One precaution which I take is the placing drawings.

of water around the cylinder, so as to lessen to a great extent the heat caused by the operation of the engine. The jacket of the cylinder is formed with a hollow portion, as 24, almost entirely surrounding the cylinder except at points where the charges are forced into the interior of the cylinder. The hollow portion or water-space 24 communicates with openings formed through the trunnion 22. \Vater may be supplied to this space by any suitable means; but I preferably suspend a tank, as 25, from the frame of the vehicle. The tank is connected with the lower space formed in the trunnion 22 and affords an inlet to the water-space for the water in the tank 25. The upper space of the trunnion forms an outlet to said water-space 24 and is connected to the upper portion of the tank 25 by a pipe, as illustrated in Fig. 4 of the These connecting-pipes are preferably provided with cocks to regulate the flow of water from the tank to the waterjacket. The trunnion 21 on the opposite side of the cylinder 1 is also made hollow and is connected with a tank,'as 26, which contains gasolene or compressed gas, as the case may be, for running the gas-engine. Just below "the tank 26 is mounted a mixer or carbureter,

as 26, as seen in Fig. 3 of the drawings. This carbureter may be of any desired or wellknown form or may-be, as seen in detail in Fig. 9 of the drawings, formed of an outer casing, as 26 Inside the said casing concentric partitions 26 and 26 are secured, forming chambers internally of said casing. Inclined partitions, as 26, are arranged be tween the concentric partitions and between one of said concentric partitions and the casing 26, so as to form spiral passages. The partitions 26 and 26 are provided with apertures, as 26 whereby communication is formed between the chambers formed in the casing. A connecting-pipe, as 27, enters the bottom of the central chamber, extending some distance into the same. Gas or gasolene is admitted into the mixerfrom the tank 26 by means of a pipe leading to the upper portion of the chamber formed between the concentric partitions, as at 26" Air is admitted to the mixer at 26, entering the outer concentric chamber first and passing'through the same into the second chamber. The gas or gasolene also enters the second chamber, so that it becomes mixed with the air, and the mixture passes into the central chamber of the mixer,whence it is conducted into the engine through the pipe 27. The connectingpipe 27 is provided with a regulating valve or cock 28, by which the flow of explosive mixture to the engine may be controlled. A lever for operating the said valve extends up to within easy reaching distance of the seats of the vehicle. Above cylinder 1 a gas-compressor, as 29, is mounted, consisting of a cylinder provided with a piston 30. The piston 30 is mounted on the inner end of a pistonrod 31, the outer end of which rod is connected by an arm 32 with the piston-rod 5. By this construction it will be noted that the piston 30 will have a movement corresponding to the movement of the piston 4, so that upon every reciprocation of the piston 4 the piston will compress a new charge to drive the piston 4 to the opposite extremity of its movement again. The cylinder 1 is provided with compression-chambers 33 nearits ends, which extend part way around its circumference. These compression-chambers 33 communicate with the cylinder 1 through valve-openings 34. The compressor-cylinder 29 communicates with the compression-chambers 33 by means of valve-openings 35. The openings 35 are adapted to beclosed by means of the valves 36, which are normally held against the said openings by means of spring-pressure, and the construction of these valves is such that a charge of compressed explosive mixture can be forced from the compressor into the compression-chambers 33, but cannot return into the said compressor. Aper tures 34 are controlled by the valves 37,which are adapted to be operated in the following manner: Each stem of the valves 37 extends outwardly through the casing of the compression-chambers 33 and through a tubular extension 38 formed thereon. Surrounding the tubular extension 38 is an inclosing cap 39, which is adapted to slide back and forth upon the tubular extension 38. Fixed upon the stems of each valve 37 is a collar 40, between which and the end of a tubular extension 38 is mounted a compression-spring 41, which normally tends to keep the valve 37 closed. Each cap 39 is provided with side pins or studs 42, carrying friction-rollers 43, which are adapted to engage adjustable blocks 44, mounted upon the extensions or arms 45, which are concentric with the center of the trunnion 21. The blocks 44 are adapted to be moved in the concentric grooves formed in the extensions or brackets 45 and are provided with raised portions, as 46,which piston to the opposite end of its stroke. When the cylinder oscillates in the other direction, the friction-rollers 43 will be moved away from the raised portions 46, and the valve 37 will be again closed by the action of the spring 41. By connecting the blocks 44 at each end I of the cylinder with the lever, as 47, and by moving the lever 47 it will be seen that the blocks may be adjusted at different positions in their respective grooves, so as to change the point of time at which the charge of explosive mixture is admitted to different ends of the cylinder. A suitable operating-lever 48 extends to within easy reaching distance of the seats for operating the said lever 47. By this arrangement of the blocks 44 the operation of the lever 48 in one direction will raise one set of blocks, while it lowers the other set, thus causing the valves controlled thereby to be opened in such a manner as to actuate the engine in one direction. When the lever 48 is moved in the opposite direction, the blocks 44 will be changed to correspond, and the valves controlled thereby will be operated at a different time, so as to reverse the movement of the engine. It will be apparent that this valve-controlling mechanism can be adjusted to admit the explosive mixture or compressed air to a nicety for running the engine at the desired speed and for reversing the same.

It is very important in an engine of this kind that the charge of explosive mixture used to operate the piston shall be caused to explode at the precise moment when the opening is made to admit said charge into the cylinder. In order to accomplish this, Ihave devised a means which cannot fail to ignite the charge at the exact moment desired, for I make the stems of the valves 34 perform the function of an electrode. The other electrode is mounted in close proximity to the said stems and comprises a stem or rod 49, which is mounted in bearings 50 in the wall of each compression-chamber 33. The inner end of each stem 49 carries a toothed wheel, as 51, adapted to be engaged by an annular flange 52, formed upon the sleeve secured to each valve-stem. The stems 49 are adapted to be held at theirinner positions by means of coilsprings 53, mounted in the closing-caps 54. The electrodes 49 are well insulated from the walls of the compression-chamber 33 by suitable insulating material, as 55. trodes are suitably connected with a battery or other source of electricity, so that when the valve 37 opens the flanges 52 will snap by the teeth of the wheels 51 and cause a spark, which will ignite the charge of explosive mixture at the proper time.

In Figs. 13 and 14 I have shown a modified form of electrode in which the toothed wheel 56 is mounted upon the inner end of a sleeve 57, the said sleeve being insulated from the wall of the compression-chamber 33, in which it is secured. The wheel 56 is provided with toothed flanges, as 58, and has a central por- The election formed with a series of depressions, as 59, which are adapted to engage the inner end of a sliding stem 60. The stem 60 extends outwardly into a casing 61 and carries a collar or washer 62, adapted to move in the said casing 61. A cap 63 closes the outer end of the casing 61 and also forms a guide for the outer end of the stem 60 and is secured to a wire communicating with one pole of a battery. A coil-sprin g is interposed between the cap 63 and the collar 62, whereby the stem is normally held in contact with the depressions It will be seen that whenever the valve is moved the annular flange thereon will engage a tooth of the wheel 56 and rotate the same, thus causing another depression to be brought opposite the end of the stem 60, and the spring which forces the stem forward will assist in causing a snapping action between the two electrodes, and thus facilitate the production of the necessary spark to ignite the charge of explosive mixture. opposite side of the cylinder from the valves 37 are arranged exhaustports 64. These ports are controlled by valves 65, similar to the valve 37 except that they open in an opposite direction relatively to the cylinder and do not form electrodes. The stems of these valves are provided with caps 66, similar to the caps 39, and having friction-rollers 67. These rollers 67 engage adjustable blocks 68, similar to the blocks 46, and mounted in the brackets or arms 69, similar to the brackets 45.

said valves in their closed positions. The exhaust-ports 64 open into the exhaust passage- 6 Coil-springs 70 normally hold the Upon the valves 65 to operate to correspond with the action of the valves 37, so that when a charge of explosive mixture is admitted into the cylinder at one end the other end of the said cylinder will be open to the exhaust-passage.

A very important feature of my improved motor is the means whereby I am enabled to use compressed air to run the motor at either end of the cylinder and at the same time that gas is being used-at the other end. In carrying out this part of my invention I provide suitable tanks for holding compressed air. Preferably at least two of these tanks are employed. A small compressing-cylinder, as 72, is mounted upon the frame at any suitable point and provided with a piston 73, connected with one of the fly-wheels 8 in any suitable manner to reciprocate it and cause the said compressor to force air into storage-tanks, as 74. These tanks 74 for holding the compressed air may be mounted below the motor, as shown in Fig. 3 of the drawings, or above it, as shown at 75, Fig. 4. These compressedair tanks are connected directlywith the compression-chamber 33 of the motor. In order ings, a sliding packed joint, as at may be employed. These connections 76 are preferably provided with check-valves, as 77, which allow the compressed air to enter the said compression-chamber v33, but prevent it returning therefrom. In forming the sliding packed joint 75 the connections 76 are formed on an arc struck from the axis of the trunnions of the cylinder as a center, one portion of the said joints being attached to the compression chambers 33, while the other portions, which are adapted to slide in the first-named portions, are secured to the compressed-air tanks 74. It will be seen that by constructing these connections in this manner the cylinder will be free to oscillate, while at the same time a connection is maintained between the compressed-air tanks and the compression-cl1ambers. In order to control the admission of compressed air into the compression-chambers, each connection 76 is provided with a stop-cock 7 8, which is also provided with an operating-lever adapted'to extend within reach of the seat of the vehicle. After the compressed-air tanks have once been charged the operation of the vehicle always maintains a supply of compressed air in the said tanks by means of the compressor 72. To render the expansive force of the compressed air greater, the tank or tanks containing the same may be heated either bya lamp or other like means or by conducting the exhaust from the gas explosions in the cylinder, so as to surround the said tank. This latter construction is illustrated in Fig.4 of the drawings, in which the exhaust-passage 71 of the cylinder is connected by means of a pipe 79 with an inclosing jacket 80, formed around the air-tank 75. By this means the exhaust from the cylinder is so disposed around the said air-tank as to deliver up a great quantity of its heat to the air in said tank.

It will be apparent that one or any number of air-tanks might be used for holding compressed air in connection with an engine of the type described without departing from the spirit of my invention. In this case only one air-tank need be connected with the cylinder at a time, so that the compressor 72 will not be required to compress air against the expansion of the heated compressed air in the tank being used. It will only be required to store a new supply of air in cool tanks. This renders the use of great power to move the compressor 72 unnecessary, and therefore detracts little from the operation of the motor.

It will be readily seen from the device described that I have adapted my motor to be run by a gaseous or explosive mixture or that I can use compressed air to assist in the running of the motor. When using explosive mixture in both ends of the cylinder, the supply of compressed air from the air-tank is cut off by means of the cooks 78. In this instance the explosive mixture enters the hollow trunnion 21 and passes to each compressionchamber 33 through the passage 81. The operation of the compressor-piston draws a charge of gas mixture into the compressor through valves 82, arranged upon the opposite side of the compressor-cylinder 29 from the valves 36. These valves are similar to the valves 36, but are arranged to permit the gas mixture to enter the compressor, but to prevent its returning again. The compressor then compresses the gas mixture and forces it through the valves 36 into the compression-chambers 33, where at the proper moment when the valves 37 are opened by the oscillation of the cylinder it escapes into the cylinder, being ignited at the same moment. This drives the piston forward to the opposite end of the cylinder, when the same operation takes place at the other end of the compressor and cylinder. WVhen it is desired to use compressed air in one end of the cylinder, valve 82 at the end of the cylinder in which it is desired to use the compressed air is held open by means of a lever 83, the said lever being adapted to engage a toothed quadrant 84: to hold it in any desired position. This permits the compressor at that end of the cylinder to exhaust the explosive mixture back into the inlet. The cook 78 from the air-tank is then opened and the compressed air is allowed to enter the compression-chamber at the end of the cylinder which it is desired to run by air-pressure. The pressure of the air in the compressionchamber will hold the valve 36 closed, so that the explosive mixture cannot enter the compression-chamber and so that the compressed air also cannot escape into the same. The operation of the valve 37 at that end of the cylinder will permit the compressed air to rush into the cylinder at the proper time. It will thus be seen that I can use gas at either end of the cylinder and compressed air at the other end at the same time, which I find enables me to produce great power and yet in a Way that does not affect the packing of the engine so much as heretofore.

My motor may be adapted for operation upon any style of vehicle; but, as shown in the drawings, the arms 3 of the motor-frame preferably engage the driving-shaft of the vehicle and are carried thereby. Any suit able gearing may be interposed between the driving-shaft of the vehicle and the powershaft of the vehicle, the frictional gearing 85 shown in the drawings being mounted upon the power-shaft of the vehicle and adapted to engage in any well-known manner the frictional gearing 88, mounted upon the rear axle of the vehicle.

It will be apparent from the description of the device as above given that I am enabled to produce a motor of very superior construction and one which may be adapted to propel any vehicle to which it may be applied with great power. The combination of the use of an explosive mixture at one end of the cylinder and compressed air at the other produces very powerful results.

While I have described and shown my improved form of vehicle and gearing therefor, yet I make no claim to these parts in the present application, as they form the subjeot-matter of another application filed by me.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A motor comprising an oscillating cylinder mounted upon a suitable frame, a compressor mounted upon and carried by the said cylinder, the piston in the compressor being connected with a piston in the cylinder so as to operate when the cylinder oscillates, and means connecting the ends of the cylinder with the ends of the compressor, whereby operating chargesmay be compressed and forced into the cylinder, substantially as described.

2. In a motor, the combination of an oscillating cylinder, mounted upon a suitable frame, a compressor mounted upon and carried by said cylinder so as to oscillate therewith and adapted to be operated by the movement of the piston in the cylinder, means for admitting an explosive mixture into said compressor and cylinder for operating the piston, and means for introducing air in the place of the said explosive mixture to assist in the operation of the piston, substantially as described.

3. A motor comprising in its construction an oscillating cylinder having a suitable piston, a compressor adapted to oscillate with said cylinder and connected to said piston, whereby it is operated. by the reciprocation of the said piston, means for admitting an explosive mixture to either end of the said cylinder, and means for admitting air under pressure for propulsion to either end of the said cylinder whereby the piston may be operated, substantially as described.

4. A motor comprising in its construction a cylinder, means for connecting the said cylinderwith a compressed-air supply for startin g the operation of the motor, means for compressing air in said supply, and a compressor mounted and carried by the said cylinder for compressing and forcing an explosive mixture into the said cylinder at the same time that the compressed air is being used to assist in the operation of the motor, substantially as described.

5. In a motor for vehicles, the combination I with a suitable frame, of an oscillating cylinder mounted thereon, a compressor mounted upon and carried by the said cylinder so as to oscillate therewith and adapted to be operated by the movement of the piston in the cylinder, compression-chambers also formed upon the said cylinder and connecting the samewith the ends of the compressor, means for supplying the compressor with an explosive mixture, and means for supplying the compression-chambers with compressed air,

whereby the piston in the cylinder may be.

operated by an explosive mixture alone or compressed air alone or by means of an explosive mixture at one end and compressed air-at the other, substantially as described.

6. In a motor for vehicles, the combination of an oscillating cylinder, a compressor mounted thereon, compression chambers formed at either end of the said cylinder, valves in said chambers for regulating the flow of an explosive mixture through the said compressor and cylinder, and means connected with a piston for operating the compressor, substantially as described.

7. In a motor for vehicles, the combination with a suitable framework, of a cylinder pivotally mounted thereon so as to be free to oscillate, compression-chambers upon said cylinder adapted to receive a charge of an explosive mixture, a compressor for preparing said charge mounted on said oscillating cylinder, valves for said compression-chamber for regulating the flow of explosive mixture, means for igniting the explosive mixture in the compression-chambers, and means for controlling the admission of the explosive mixture to the cylinder and of the exhaust therefrom, adapted to be operated by the oscillation of the cylinder, substantially as described;

8. In a motor for vehicles, the combination with a suitable frame, of a cylinder pivotally mounted upon said frame, and a main shaft also mounted thereon, a crank formed upon the said main shaft and a piston-rod connect ing the said crank with a piston in the cylin der whereby upon the operation of the piston the cylinder is caused to oscillate, means for admitting an explosive mixture, and also means for admitting air to operate said piston, the construction being such that the explosive mixture alone or air alone, or the explosive mixture and air together may be used to operate the engine, substantially as de= scribed.

9. In a motor for vehicles, the combination with a suitable frame, of a cylinder provided with hollow trunnions mounted upon said frame, a water-jacket surrounding the said cylinder and adapted to receive a supply of water through one of saidhollow trunnions, means for admitting an explosive mixture to said cylinder through the other hollow trun nion, and valves for controlling the flow of r the explosive mixture adapted to be operated by the oscillation of the cylinder, substantially as described.

10. In a motor for vehicles, the combination With a suitable cylinder mounted thereon, of compression-chambers connected with said cylinder, electrodes mounted in said compres sion-c'hambers, one of said electrodes in each chamber consisting of a spring-pressed rod carrying a toothed wheel and the other elec trode in each compression-chamber compris= ing a valve adapted to regulate the flow of an explosive mixture from each compression chamber into the cylinder, the said valves being normally held closed by the spring, and

means for opening said valve and causing the said electrodes to make and break the contact simultaneously for igniting the explosive charge, substantially as described.

11. A motor for vehicles, comprising a suitable cylinder mounted thereon, compressionchambers connected with each end of the cylinder, a compressor formed upon said cylinder and also connected with the said compression-chambers, means for admitting compressed airto each compression-chamber, and means for admitting an explosive mixture to said compression-chambers and through the same to the said cylinder, and valves for controlling the flow of the air and explosive mixture whereby either air or the explosive mixture may be admitted to either end of the cylinderfor operating the piston therein, substantially as described.

12. In a motor for vehicles, the combination of an oscillating cylinder, compression-chambers mounted on each end of the same,one or more compressed-air tanks also mounted upon the said vehicle, and means for connectin g the said air-tanks with the said compression-chambers for operating the piston in the cylinder and means for heating the said compressed-air tanks, substantially as described.

In a motorfor vehicles, the combination of an oscillating cylinder mounted thereon, air cylinders mounted upon said vehicle, means connected with the main shaft of the motor for compressing air in the said cylinders and means for heating the air in the said cylinders, means for delivering the said compressed air through the ends of the cylinder foroperatin g the piston therein, the construction being such that the supply of air may be derived from the compressed-air cylinder which is being heated while the air may be compressed in the other cylinder, which is not being heated at the same time, substantially as described.

14. In a motor, the combination with a cylinder adapted to oscillate, of compressionchambers connected with each end of the said cylinder, means for supplying the said compression-chambers with explosive mixture or air, valves for controlling the flow of said operating mixture through the said cylinder, and valves for controlling the exhaust from the said cylinder, adj listing-blocks mounted in the supporting-frame of the said cylinder, means secured to the outer end of the said valves adapted to engage the said blocks whereby the valves are adapted to be opened and closed at the proper time, and means for adjusting the said blocks for regulating the time when the valves are opened, substantially as described. 7

15. In a motor for vehicles, the combination with a suitable frame, of a cylinder pivotally mounted thereon,whereby the same is adapted to be oscillated, compression-chambers secured to said cylinder and connected to each end thereof, means for supplying the said compression-chambers with air and an explosive mixture for operating the same, valves for controlling the flow of the said explosive mixture or air,friction-rollers secured to the outer end of said valves and adapted to engage adjustable blocks mounted in arms formed upon the said frame, whereby the valves are opened and closed at the proper time, the said blocks being mounted in grooves concentric with the axis upon which the cylinder oscillates, and means for raising and lowering the blocks as desired to change the time of opening the valves, to regulate the running of the motor, substantially as described.

16. In a motor for vehicles, the combination with a suitable frame, of an oscillating cylinder mounted thereon, compression-chambers communicating with the ends of said cylinder, compressed-air tanks also mounted upon the said frame, means forconnecting the said compressed-air tanks with the said compression-chambers, the said means being provided with a sliding joint formed concentric with the axis upon which the cylinder oscil lates whereby the connection with the airtanks is maintained in all positions which the cylinder assumes, substantially as described.

17. In a motor for vehicles,the combination with a suitable frame, of an oscillating cylinder mounted thereon, a compressor formed upon said cylinder, compressionchambers connected with each end of the cylinder and also with the compressor, valves for controlling the openings which connect the said compressor and cylinder with the said compression-chambers, means for admitting an explosive mixture to said compressor, means for admitting compressed air to the said compression-chambers, valves for controlling the entrance of the explosive mixture into the said compressor, and means for holding one of said valves at one end of the compressor open, when using compressed air at one end of the cylinder and an explosive mixture at the other end thereof, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

, JOHN WASHINGTON EISENIIU'JH.

Witnesses:

W. FIsKE TREVETT, S. W. RoMAIN. 

